The placebo training will be a previously recorded Neurofeedback session of a participant in group A (receiving 14 real Neurofeedback sessions). Before the participants in group C (placebo trainings) start, they will be matched to a participant in group A, and receive the exact same (prerecorded) feedback per session of their matched participant. In this way, participants in the placebo training are then made to think that the video and EEG feedback is their own, however they are actually not able to influence the continuation of the video.